What are the best tank mates for Oscar?

Top engine-approved picks: . Each shares a workable temperature and pH band with Oscar and clears the temperament and predation checks in a spacious reference tank.

What fish should you avoid keeping with Oscar?

The engine red-flags Acei Cichlid, Adonis Pleco, African Butterfly Cichlid among others — for incompatible water, temperament conflict or predation risk. The avoid list above states the specific reason for each pairing.

Oscar care guide

Oscar tank mates

Every recommendation below is computed, not copied: the AquaSage engine paired Oscar (35 cm / 13.8 in, semi-aggressive) with 271 fish and invertebrates in a spacious reference tank and scored each pair for water-parameter overlap, temperament, predation and husbandry. A species makes the green list only when every check passes at 22–30 °C (71.6–86 °F).

Verdicts by the AquaSage engine v0.1.2 in a 450 L reference tank. Read the full methodology →

Best tank mates for Oscar

Avoid with Oscar

Acei Cichlid— Tank is too small for some species
Adonis Pleco— Tank is too small for some species
African Butterfly Cichlid— Tank is too small for some species
African Butterflyfish— Tank is too small for some species
Agassiz's Cory— Tank is too small for some species
Agassiz's Dwarf Cichlid— Tank is too small for some species
Altum Angelfish— Tank is too small for some species
Amano Shrimp— Tank is too small for some species
Angelfish— Tank is too small for some species
Assassin Snail— Tank is too small for some species
Auratus Cichlid— Tank is too small for some species
Bala Shark— Tank is too small for some species
Bamboo Shrimp— Tank is too small for some species
Banjo Catfish— Tank is too small for some species
Betta (Siamese Fighting Fish)— Tank is too small for some species
Black Moor Goldfish— No temperature suits every species here
Black Neon Tetra— Tank is too small for some species
Black Phantom Tetra— Tank is too small for some species
Black Ruby Barb— Tank is too small for some species
Black Skirt Tetra— Tank is too small for some species
Blackline Rasbora— Tank is too small for some species
Bladder Snail— Tank is too small for some species
Bleeding Heart Tetra— Tank is too small for some species
Blood Parrot Cichlid— Tank is too small for some species
Bloodfin Tetra— Tank is too small for some species
Blue Acara— Tank is too small for some species
Blue Dolphin Cichlid— Tank is too small for some species
Blue Tiger Shrimp— Tank is too small for some species
Blue Velvet Shrimp— Tank is too small for some species
Boesemani Rainbowfish— Tank is too small for some species
Bolivian Ram— Tank is too small for some species
Borleyi (Redfin Hap)— Tank is too small for some species
Borneo Sucker— Tank is too small for some species
Brevis Shell Dweller— Tank is too small for some species
Brichard's Teleogramma— Tank is too small for some species
Brichardi (Fairy Cichlid)— Tank is too small for some species
Bristlenose Pleco— Tank is too small for some species
Bronze Corydoras— Tank is too small for some species
Buenos Aires Tetra— Tank is too small for some species
Buffalohead Cichlid— Tank is too small for some species
Bumblebee Cichlid— Tank is too small for some species
Bumblebee Goby— Tank is too small for some species
Butterfly Hillstream Loach— Tank is too small for some species
Calvus Cichlid— Tank is too small for some species
Cardinal Tetra— Tank is too small for some species
Celebes Rainbowfish— Tank is too small for some species
Celestial Pearl Danio— Tank is too small for some species
Checkerboard Cichlid— Tank is too small for some species
Checkered Barb— Tank is too small for some species
Cherry Barb— Tank is too small for some species
Cherry Shrimp— Tank is too small for some species
Chili Rasbora— Tank is too small for some species
Chinese Algae Eater— Tank is too small for some species
Chocolate Cichlid— Tank is too small for some species
Chocolate Gourami— Tank is too small for some species
Clown Killifish— Tank is too small for some species
Clown Loach— Tank is too small for some species
Clown Pleco— Tank is too small for some species
Cobalt Blue Zebra— Tank is too small for some species
Cochu's Blue Tetra— Tank is too small for some species
Cockatoo Dwarf Cichlid— Tank is too small for some species
Colombian Ramshorn Snail— Tank is too small for some species
Comet Goldfish— No temperature suits every species here
Common Goldfish— No temperature suits every species here
Common Pleco— Tank is too small for some species
Compressiceps Cichlid— Tank is too small for some species
Congo Dwarf Cichlid— Tank is too small for some species
Congo Tetra— Tank is too small for some species
Convict Cichlid— Tank is too small for some species
Crystal Red Shrimp— Only one carbonate hardness (KH) value suits everyone — no margin
Cuckoo Catfish— Tank is too small for some species
Cylindricus Cichlid— Tank is too small for some species
Cyprichromis— Tank is too small for some species
Demasoni Cichlid— Tank is too small for some species
Demon Eartheater— Tank is too small for some species
Denison Barb— Tank is too small for some species
Diamond Tetra— Tank is too small for some species
Discus— Tank is too small for some species
Doctor Fish— Tank is too small for some species
Dogtooth Cichlid— Tank is too small for some species
Dojo (Weather) Loach— Tank is too small for some species
Duboisi Tropheus— Only one pH value suits everyone — no margin
Dwarf Chain Loach— Tank is too small for some species
Dwarf Flag Cichlid— Tank is too small for some species
Dwarf Gourami— Tank is too small for some species
Dwarf Neon Rainbowfish— Tank is too small for some species
Dwarf Orange Crayfish— Tank is too small for some species
Dwarf Pea Puffer— Tank is too small for some species
Dwarf Petricola Catfish— Tank is too small for some species
Dwarf Rasbora— Tank is too small for some species
Electric Blue Ahli— Tank is too small for some species
Electric Yellow Lab— Tank is too small for some species
Elephantnose Fish— Tank is too small for some species
Ellioti Cichlid— Tank is too small for some species
Elongate Mbuna— Tank is too small for some species
Ember Tetra— Tank is too small for some species
Emerald Cory— Tank is too small for some species
Emperor Tetra— Tank is too small for some species
Endler's Livebearer— Tank is too small for some species
Endlicheri Bichir— Tank is too small for some species
Even-spotted Synodontis— Tank is too small for some species
Fantail Goldfish— No temperature suits every species here
Featherfin Squeaker— Tank is too small for some species
Festivum (Flag Cichlid)— Tank is too small for some species
Figure-8 Puffer— Tank is too small for some species
Firemouth Cichlid— Tank is too small for some species
Five-bar Cichlid— Tank is too small for some species
Flame Tetra— Tank is too small for some species
Forktail Rainbowfish— Tank is too small for some species
Freshwater Clam— Tank is too small for some species
Frontosa— Tank is too small for some species
German Blue Ram— Tank is too small for some species
Ghost Shrimp— Tank is too small for some species
Glass Catfish— Tank is too small for some species
Glowlight Danio— Tank is too small for some species
Glowlight Tetra— Tank is too small for some species
Goby Cichlid— Only one pH value suits everyone — no margin
Gold Barb— Tank is too small for some species
Golden Dwarf Cichlid— Tank is too small for some species
Golden Julie— Tank is too small for some species
Golden Pencilfish— Tank is too small for some species
Golden Tetra— Tank is too small for some species
Golden Wonder Killifish— Tank is too small for some species
Green Discus— Tank is too small for some species
Green Neon Tetra— Tank is too small for some species
Green Spotted Pufferfish— Freshwater and brackish species cannot share a tank
Green Terror— Tank is too small for some species
Guppy— Tank is too small for some species
Harlequin Rasbora— Tank is too small for some species
Head-and-Tail-Light Tetra— Tank is too small for some species
Heckel Discus— Only one hardness (GH) value suits everyone — no margin
Honey Gourami— Tank is too small for some species
Hongi Cichlid— Tank is too small for some species
Iridescent Shark— Tank is too small for some species
Jack Dempsey— Tank is too small for some species
Jaguar Cichlid— Tank is too small for some species
Japanese Trapdoor Snail— Tank is too small for some species
Jewel Cichlid— Tank is too small for some species
Johanni Cichlid— Tank is too small for some species
Julii Cory— Tank is too small for some species
Kenyi Cichlid— Tank is too small for some species
Keyhole Cichlid— Tank is too small for some species
Kissing Gourami— Tank is too small for some species
Koi— No temperature suits every species here
Kribensis— Tank is too small for some species
Kuhli Loach— Tank is too small for some species
Lambchop Rasbora— Tank is too small for some species
Least Killifish— Tank is too small for some species
Lemon Cichlid— Tank is too small for some species
Lemon Tetra— Tank is too small for some species
Leopard Danio— Tank is too small for some species
Little Corydoras— Tank is too small for some species
Livingstoni— Tank is too small for some species
Macmasteri Dwarf Cichlid— Tank is too small for some species
Maingano Cichlid— Tank is too small for some species
Malawi Eyebiter— Tank is too small for some species
Malawi Hawk— Tank is too small for some species
Malaysian Trumpet Snail— Tank is too small for some species
Marble Hatchetfish— Tank is too small for some species
Marlieri Cichlid— Tank is too small for some species
Masked Julie— Tank is too small for some species
Medaka Ricefish— Tank is too small for some species
Molly— Tank is too small for some species
Moonlight Gourami— Tank is too small for some species
Multifasciatus Shell Dweller— Tank is too small for some species
Mystery Snail— Tank is too small for some species
Neon Tetra— Tank is too small for some species
Nerite Snail— Tank is too small for some species
Ocellatus Shell Dweller— Tank is too small for some species
Odessa Barb— Tank is too small for some species
Oranda Goldfish— No temperature suits every species here
Ornate Bichir— Tank is too small for some species
Otocinclus— Tank is too small for some species
Panda Corydoras— Tank is too small for some species
Paradise Fish— Tank is too small for some species
Paraguay Eartheater— Tank is too small for some species
Peaceful Betta— Tank is too small for some species
Peacock Bass— Tank is too small for some species
Peacock Cichlid— Tank is too small for some species
Pearl Danio— Tank is too small for some species
Pearl Gourami— Tank is too small for some species
Penguin Tetra— Tank is too small for some species
Peppered Corydoras— Tank is too small for some species
Pictus Catfish— Tank is too small for some species
Pike Cichlid— Tank is too small for some species
Platy— Tank is too small for some species
Polka Dot Loach— Tank is too small for some species
Port Cichlid— Tank is too small for some species
Powder Blue Cichlid— Tank is too small for some species
Purple Emperor Tetra— Tank is too small for some species
Pygmy Corydoras— Tank is too small for some species
Rabbit Snail— Tank is too small for some species
Rainbow Cichlid— Tank is too small for some species
Rainbow Shark— Tank is too small for some species
Ramshorn Snail— Tank is too small for some species
Ranchu Goldfish— No temperature suits every species here
Red Devil— Tank is too small for some species
Red Empress— Tank is too small for some species
Red Rainbowfish— Tank is too small for some species
Red Terror— Tank is too small for some species
Red Whiptail Catfish— Tank is too small for some species
Red Zebra Cichlid— Tank is too small for some species
Red-Tail Shark— Tank is too small for some species
Redhead Cichlid— Tank is too small for some species
Regan's Julie— Tank is too small for some species
Reticulated Flying Fox— Tank is too small for some species
Reticulated Hillstream Loach— Tank is too small for some species
Rostratus— Tank is too small for some species
Rosy Barb— Tank is too small for some species
Rosy Red Minnow— No temperature suits every species here
Rosy Tetra— Tank is too small for some species
Royal Pleco— Tank is too small for some species
Rubber Lip Pleco— Tank is too small for some species
Rummynose Tetra— Tank is too small for some species
Rusty Cichlid— Tank is too small for some species
Ryukin Goldfish— No temperature suits every species here
Sailfin Molly— Tank is too small for some species
Sailfin Pleco— Tank is too small for some species
Salt and Pepper Cory— Tank is too small for some species
Salvini Cichlid— Tank is too small for some species
Sand-sifting Xenotilapia— Tank is too small for some species
Saulosi Cichlid— Tank is too small for some species
Scarlet Badis— Tank is too small for some species
Scissortail Rasbora— Tank is too small for some species
Serpae Tetra— Tank is too small for some species
Severum— Tank is too small for some species
Shubunkin Goldfish— No temperature suits every species here
Siamese Algae Eater— Tank is too small for some species
Silver Arowana— Tank is too small for some species
Silver Moony— Freshwater and brackish species cannot share a tank
Silver Tip Tetra— Tank is too small for some species
Similis Shell Dweller— Tank is too small for some species
Skunk Cory— Tank is too small for some species
Sparkling Gourami— Tank is too small for some species
Spotted Hoplo— Tank is too small for some species
Star Sapphire— Tank is too small for some species
Sterbai Corydoras— Tank is too small for some species
Strawberry Rasbora— Tank is too small for some species
Striped Kribensis— Tank is too small for some species
Striped Raphael Catfish— Tank is too small for some species
Sulawesi Cardinal Shrimp— Tank is too small for some species
Sunshine Peacock— Tank is too small for some species
Sveni Eartheater— Tank is too small for some species
Swordtail— Tank is too small for some species
T-Bar Cichlid— Tank is too small for some species
Taiwan Reef Cichlid— Tank is too small for some species
Telescope Goldfish— No temperature suits every species here
Texas Cichlid— Tank is too small for some species
Thai Micro Crab— Tank is too small for some species
Thick-lipped Gourami— Tank is too small for some species
Threadfin Acara— Tank is too small for some species
Threadfin Petrochromis— Tank is too small for some species
Threadfin Rainbowfish— Tank is too small for some species
Three-spot Gourami— Tank is too small for some species
Tiger Barb— Tank is too small for some species
Tropheus— Only one pH value suits everyone — no margin
Turquoise Rainbowfish— Tank is too small for some species
Uaru (Triangle Cichlid)— Tank is too small for some species
Umbrella Dwarf Cichlid— Tank is too small for some species
Upside-down Catfish— Tank is too small for some species
Vampire Shrimp— Tank is too small for some species
Venezuelan Cory— Tank is too small for some species
Venustus (Giraffe Cichlid)— Tank is too small for some species
White Cloud Mountain Minnow— Tank is too small for some species
Wolf Cichlid— Tank is too small for some species
Wrestling Halfbeak— Tank is too small for some species
X-ray Tetra— Tank is too small for some species
Yoyo Loach— Tank is too small for some species
Zebra Danio— Tank is too small for some species
Zebra Mbuna— Tank is too small for some species
Zebra Pleco— Tank is too small for some species

Frequently asked questions

What are the best tank mates for Oscar?: Top engine-approved picks: . Each shares a workable temperature and pH band with Oscar and clears the temperament and predation checks in a spacious reference tank.
What fish should you avoid keeping with Oscar?: The engine red-flags Acei Cichlid, Adonis Pleco, African Butterfly Cichlid among others — for incompatible water, temperament conflict or predation risk. The avoid list above states the specific reason for each pairing.

Plan a Oscar tank in the calculator